High-temperature Mechanical Properties and Dynamic Recrystallization Mechanism of in situ Silicide-reinforced MoNbTaTiVSi Refractory High-entropy Alloy Composite

被引：7
作者：
Ge, Shaofan [1 ,2 ]
Lin, Shifeng [1 ]
Fu, Huameng [1 ,3 ,4 ]
Zhang, Long [1 ]
Geng, Tieqiang [1 ]
Zhu, Zhengwang [1 ,3 ,4 ]
Li, Zhengkun [1 ,3 ]
Li, Hong [1 ,3 ]
Wang, Aimin [1 ,3 ,4 ]
Zhang, Hongwei [1 ,3 ,4 ]
Zhang, Haifeng [1 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
[4] Dongguan Eontec Co Ltd, Dongguan 523662, Peoples R China
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2022年 / 35卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Refractory high-entropy alloy composite; Mechanical properties; In situ silicide compound; Dynamic recrystallization; HOT DEFORMATION CHARACTERISTICS; CORROSION BEHAVIOR; OXIDATION BEHAVIOR; MICROSTRUCTURE; ENHANCEMENT; SUPERALLOY; DUCTILITY; BOUNDARY; TI5SI3; TI;
D O I：
10.1007/s40195-022-01394-7
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The hypoeutectic composite material composed of BCC phase and in situ precipitated Ti5Si3 was prepared by adding Si into MoNbTaTiV high-entropy alloy. The obvious oriented in situ Ti5Si3 phase formed eutectic phase with BCC phase in the inter-dendritic area, which leads to excellent properties of the composite. The alloy exhibits ultra-high yield stress of 718 MPa at 1200 degrees C and obvious compression plasticity. After reaching the maximum strength, dynamic recovery (DRV) and dynamic recrystallization (DRX) caused soften phenomena. The DRX mechanism of the dual-phase eutectic structure is analyzed by electron backscatter diffraction. The DRX of the BCC phase conforms to the discontinuous DRX and continuous DRX mechanisms, while the Ti5Si3 phase has a geometric DRX mechanism in addition to the above two mechanisms. The high performance of this composite has enough potential high-temperature applications such as nuclear and aero engine.
引用
收藏
页码：1617 / 1630
页数：14
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